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Question
Factorise the expression.
10ab + 4a + 5b + 2
Sum
Solution
10ab + 4a + 5b + 2
= 10ab + 5b + 4a + 2
= 5b (2a + 1) + 2(2a + 1) a
= (2a + 1) (5b + 2)
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